Liquid filter



March 6, 1951 R. ca. TESSMER 2, 4,402

LIQUID FILTER Filed NOV. 15, 1947 5 Sheets-Sheet l INVENTOR fiaymgm GY 755 022,

ATTORNEYS March 6, 1951 R. G. TESSMER LIQUID FILTER Filed Nov. 15, 1947 5 Sheets-Sheet m T MG a m m March 6, 1951 R. G. TESSMER 2,544,402

LIQUID FILTER Filed Nov. 15, 194? 5 Sheets-Sheet 4 INVENTOR Raymond Tssmer ATTO R N EYS March 6, 1951 R. G. TESSMER 2,544,402

LIQUID FILTER Filed Nov. 15, 1947 5 Sheets-Sheet 5 INVENTOR ATTO RN EYJ Patented Mar. 6, 1951 My inventionvrelates in general to filteringfde ma irmdmr thefdevice 1 vices and particularly to 'afilter.of'the leafjtypel spacers "forthefle'ave and may" be varied in' which is adapted to the sepfar'ate' 'coneetiojn; 15rlength or used-interliangeably with blank spacers larifiedliquid and removed solids.

- i to, alter the distance between" adjacent rfilt'er' Itis well'known'to thoseskilled ii lthe'artfthat IeaVSlj not 'many clarification filters of the present'day A still frurtheriobjeot of theinventionis to pro are 'suitablefi for the ,rec0Very oi large fliervideivaf'le'afflfslpacerfbnieaeh filter leaf at a point:

c er tages. oi -solids; and some ,unfilteredcliquid is' substantially diametrically oppositethe --'outlet alwav'sleftfinltheltahik.V rEurthermfore, s ioli solid hub, wherebythe leavesmay be supported by the reg very filter reigiiffieult to,dieas'semblelfangi, passageiof arogi through thef spacersr' siiie "these "devioe's' 'rniistgb (cleaned afteijjeafchi Furthermore; it hasibeen an object to prov e cvclegdr. opeifation; jsider blegtime nd, efiort rods 'nassin jthr ug the. a embled outlets-sand afec'pfisumed, f thespadera -whereby the filter leaves--may-he I ,Tlie fprincipal ohjee easilyjand conveniently iastened' in position. toiiirovide a leaf filt The "above objects "anq advantages" have been ac ompli e b 'th vices h x m th c mither horizontal,orgqeiticalgp panying drawings; pfgwhich: e

il eoovery of gclarified.liqids,or.,,thel,c v a z solids extraoted thereirom; jlhe tiltin Fig. I is a sideelevation of my complete device; filterwelements lr makes it "possible to .eas Fig. 2 is an end elevation oi'the device with the giiickly clean the device witliontithe hes'itjb; filtering" unit tipped. in'horizontal "position an'd giisassembling and removing anyjfoflthe filtering the dome in eegtio n; g M 1 f r, t Lil-1 fF -i is a: f a m n r sec on v ew't k tpn jAnother obgect has (been. to llbr'ovidevanieasiiy' HIM-11 ,91 Fig 1 showing; the filter leaves" reremovable dome 'io'r the filter'whereby the leaves Q EdL 1' I V I Fig: 4 is a,, fragmentary Sectional side elevation; i Figgfi i5affragmentary sectional Viewtaken on;

Fig. fi'isfaplanjv w Q YeS'Q mimic i v iJF ai' Sii menl ee i we n 'e vet o' i o pi e I ff filtr l "Ea tak ron" in V E-VII Qf h in h f su rt p and leaf guide ro d extendingitherethrough; if: t e Fig; 8 is an enlarged fragmentary "seotio al j'td d pe d nt y 361 view of one of the "filtering leaveg of my dev ioegfi,

the'dixtlt of the de- Fig. 91s a similarview of a filtering leaf hav- I r ans ibrgjviipii 'fiiflg ing an impertorate plate atone'sidethereoi; lblovvingfga's 0 a1 underpres'uiinto g. 10 is an enlarge fragmentary sectional the aevmef'gtd .:remove.. the", remainihelflimqijd ew enlon'l n x x of P e. 3; [a

through additiohaffilt arid tohryt'he'mter 40 ig. llis an eni rgedi .t the dem rits ten cake; 1145;"? gmeana jiflz' va -tiny device. i s o i e.1,;m eyic om ris s in genr filterlaves feaiehihaving eralia filter l drai' nnnl mix nk'i fiptoninel-sliabed frame 'eitehd iig' 'aroundftliefperiph e q her vb mea' isib i a l uidii' n 29 ery or. .collectingi.the, liquid andthereliji fi iovid 4 d suitable i ah r er ribed. mg for minirnnin flfiidrtravelandtantnnobstriited .r he te i sq de fi th a nl i rb flow totli'e outlet noiz le, ofthe leafhflAifi rther leaves 2| whiqh are arranged' adjacent to"eaeh 'obje'otis "to prov amt rnear,'havihg a' 'nietalother with 1 spaceshprovided ,hetween them 7 for to-metaljseal petwe h the f aniejahdthefvariou h p e f 'liquidj n t collection f t e 5p solidsi Y V rovi'de each While, these, filters maylvhave a. perimeteii'joi v at menus any.,desir,e d shape,I, havefoundit preferable to eg. eonplingfinean s; where y; make. themEQLannuIar ormation;- ,An annular ay be intercdnneetefl', thefouttube ;22 of "GilfClilBlLQCIOSS section is, therefore,

, vghen aeeepghlegfah tlet provided 'atthe perimeterioiIeachufilter leafanq The outlet hubs mm each tube is formed with flanges 23 arranged in spaced relation with each other for the reception of the usual metal screens 24 and the interposed drainage member 25. The two screens 24 and drainage member are secured between the flanges 23 preferablyby a plurality of rivets 01' other suitable fastening means passing therethrough. In the form of invention shown in Fig. 9, an imperforate plate is arranged at one side of the drainage member 25 for reasons to be hereinafter described. Each of the tubes 23 forming the perimeter of the filter leaf is cut away at one point in its periphery and a leaf outlet hub 32 is secured thereto. Each of these fittings is formed at one end with a reduced portion 33 at one end thereof and with an enlarged portion 34 at the opposite end and formed with a recess 35 for the reception of the reduced portion 33 of an adjacent hub, whereby when assembled an outlet manifold 36 is provided for the filter leaves. In order to rigidly hold the assembled filter leaves in registering positions, a spacer 40 is secured to the tube 22 at a point opposite the outlet hub 32. Each of the spacers is provided with a central aperture through which a guide rod 4| is passed. In order to hold the outlet hubs of the assembled leaves in position, a support rod 42 is passed through the hub members. The rods 4| and 42 are extended downwardly below the last filter leaf and are screw-threaded into the head 43 of the filter. A manifold plug 44 (see Fig. 4) is disposed on the top of the outlet hub 32 of the upper filter leaf, through which the support rod 42 is passed, a

nut 45 being secured at the upper end of the rod, whereby the assembled outlet hubs may be firmly drawn together in fluid sealing relationship. A nut 46 is secured to the top of the guide rod 4| whereby the spacers 40 may be tightly drawn together. v I

A dome 50 is carried by the head 43 and is formed at its lower end with a flange 5| which is provided with a plurality of clamping lugs 52 each formed with an open slot 53 for engagemerit with one of the fastening studs 54 carried by the head 43. Engagement of the slots 53 with the studs is brought about by a rotary movement of the dome upon the head. Suitable handles 55 are provided, one preferably at each of two opposite sides thereof whereby the dome may be conveniently handled. The dome is formed with a vent cook 56 disposedat the upper end thereof and with a vent cook 60 disposed in the side thereof which is uppermost when the filter is in a horizontal position.

The head 43 of the filter is formed with trunnion bearings 6| and 62 mounted in suitable bearing blocks 63 and 64, respectively. These bearing blocks are secured to the opposite cross members 65 of the frame 66 of the device. The trunnions 6| and 62 as well as the respective engaging bearing blocks 63 and 64 are provided with registering passageways I0 and 7|, and I2 and 13, respectively, for the passage of the liquid b'eing filtered. The head 43 of the filter is pro-' vided with an inlet passageway 14 which connects the inlet passageways I2 and 'I3 of the trunnion and associated block,respectively, with the'interior of the-.dome BUeLL'I-l'ie head- -is, -furthermore, provided with an outlet passageway which registers with passa'gewa'yfof'. the manifold 36 and which is connected to. the outlet passage; ways 10 and H of the trunnion -bearing and associated block, respectively, by'rneans of a passageway l6 formedin thelhead-r 5. 1-

Obviously, as the liquid fiows into the dome it will pass through the screens of each filter leaf and the filter cakes which may be disposed thereon, flowing radially between the screens to the annular tube 22 and therethrough to the outlet hub of the screens. From the manifold 36 formed by the interconnected outlet hubs, the fiuid willfiow to the outlet passage 15 and hence through the passageway 16 to the passageways I0 and 'II of the trunnion 6| and II of the bearing block 63, respectively. Each of the trunnion blocks 63 and 64 is provided with a threaded extension 86 and 90, respectively, for connection to inlet and outlet pipe 9| and 92, respectively,

to be hereinafter described.

The bottom wall of the head 43 is preferablyconcave andis provided with a central drainage opening 8| for the recovery of the liquid remaining in the filter after filtering process through the filter leaves has been completed. Extended over the concave bottom of the head is a drainage member 82 over which is extended a screen 83. The drainage member and screen are secured in place by means of a plurality of 4 screws 84. The outlet passageway 6| of the head is suitably connected to a flexible conduit 85 having a valve 98 connectedtherein. I I

Suitable means are provided for tilting the filter I5 and may comprise a worm gear sector 93, which is suitably secured to the head 43 preferably ad jacent the trunnion bearing 62 and a worm 94 mounted upon an operating shaft 95 and engaging the sector. By rotating the shaft through the medium of an attached crank 96, the sector may be operated to tilt the filter. I A stop 91 is pro: vided at each side of sector for contact with a suitable stationary part of the structure for limit-- ing the tilting movement of the filter.

The pump 20, which for illustrative purposes, is shown as of the centrifugal type, is driven prefera'bly by means of an electric motor I00 receiv: ing its current from a suitable electric conductor I02 through switch means I0|. I The deviceis provided with a fiuid inlet pipe I03 having a suitable valve I04 therein and connectedto the suction side of the pump by means of suitable piping I05. The outlet side of the pump is connected to the threaded connection of the trunnion bearing block 64 by means of suitablepiping I06 in which is provided a valve H0. The outlet pipe 9| coming from the filter and carried by the extension 66 of the trunnion block 63 is connected to the outlet pipe I II by means of piping I I2. A valve H3 is provided in the outlet pipe III and a valve H4 is connected in the piping H2 The outlet pipe I I I is preferably connected to the pip-j mg I I2 by means of a cross fitting I I5 to one side of which the flexible outlet pipe 85 is connected. Connecting the lower end of the cross fitting with the piping I05 is a pipeline H6 in which a valve I20 is located. The piping I05 is preferably also connected to the outlet I 2| of the mix tank I6 by means of a pipeline I22, a valve I23 being located in this pipeline. Y i

The bearing block 63 is preferably provided with a test cock I24 which has an outlet I25, whereby samples of the filter liquid may be taken at any stage in the filtering process. v

..When my filter is to befus'ed, the liquid is conducted by suitable piping (not shown) to the inlet pipe I03, and valves I04 and I23 having been opened, a predetermined amount of fluid is a1 lowed to flow into the mix tank I6. When the correct amount ofli'quid has entered the tank, theyal've I04is "shut ofi. The correct amount of 51, filter aid'is now added to and mixed with the liquid within the tank. Valve H is now opened and valves I20 and H4 are closed. The electric motor I00 is then energzed through the medium of the switch l0l causing the pump to be operated. Fluid is now pumped from the mix tank into the filter l5, air being vented from the dome 50 thereof through vent cocks 56 and 60, and when fluid in the tank has been pumped into the filter, the valve I23 is closed. If double screen filter leaves are being used, such as illustrated in Fig. 8, the

filter is preferably tilted so that the leaves thereof are in vertical arrangement. The pre-coating of the leaves and the recovery screen 03is accomplished by recirculating the liquid charged with the filter aid through the screens of the filters. To accomplish this the valves 90, H4, and I20 are openedhwhile the valve H0 remains open. When the filter cakes are built up sufficiently as indicated by samples of the filtered liquid taken from the filter through the test cook 24, valve I04 will again be opened and valve I I3 will be opened for conducting the clarified fiuid from the filter to the place of storage through suitable piping (not shown) connected to the outlet pipe IH. Valve 98 is closed during the major filtering process. The liquid as it is being filtered passes through the coated screens of the filter leaves, leaving the solids deposited upon the outer surfaces of the leaves or filter aid deposited thereon. The clarified liquid will be collected in the tubes 22 whence it will be conducted to the manifold 36 and through passageways 15 and 16 to the piping H2 and through open valves H4 and H3 to the outlet pipe HI. When the filtering process has been completed, there will remain in the lower curved portion of the dome a quantity of unfiltered liquid. In order to filter this remaining liquid, the filter is rotated so as to occupy a vertical position, and the liquid will then pass through the recovery screen 83 and be conducted out through the outlet 8|, through the valve 98, which is now open, and through the flexible hose 85 to the T-fitting I I and thence out through the outlet pipe III, the valve H4 having been previously closed. In order to facilitate the passage of the remaining liquid through the recovery screen 83, suitable gas or air under pressure may be conducted to the dome by a suitable conduit (not shown) being connected preferably to the vent cook 56. Such air or gas may also be used to dry the recovered solids. When my device is to be used for the recovery of solids suspended in a liquid, the filter leaves having but one screen with an impervious metal plate at the other side, as shown in Fig. 9 are used and the filter is tilted to its vertical position. Liquid will thereby flow over the top of the filter leaves depositing the solids upon the screen or previously formed filter cake. When the filtering process has been completed and the solids have been recovered from the liquid, it will be obvious that by removing the dome by. loosening the nuts carried by the studs 54 and tilting the filter in a horizontal position, the cakes of solids deposited upon the leaves may be readily removed with the aid of suitable implements without disassembling the device. When it is desired to clean the filter, it is only necessary to remove the dome and the nuts 45 and 46 at the upper end of the support and guide rods 42 and 4|, respectively, after which the filters may be disassembled and removed from the rods by vertical movement.

What is claimed is: a

l. A filter having a plurality of spaced separable filter leaves, each filter leaf having spaced filter ing elements, and a tubular member at the perfor detachably securing said leaves to said head,

closure means removably carried by said head for encasing said filter leaves in liquid-tight manner, ported trunnion bearings for said head arranged to permit rotation thereof about an axis transverse to said passageway, liquid inlet and outlet passageways permanently connected to said ported trunnion bearings, said filter elements being exposed to the unfiltered liquidentering said closure through one Of the trunnion ports, and means connecting said outlet hubs to the other trunnion port for conducting the filtered liquid to the outlet of the device.

2. A filter having a plurality of spaced separable filter leaves, each filter leaf having spaced filtering elements, a tubular member at the perimeter thereof for enclosing the edges of said elements, said member being in open communication with the space between said elements, an outlet hub secured to each of said filter leaves and. having an axial passageway normal to the filtering elements and opening into said tubular member, a filter head for supporting said filter leaves, means for detachably securing said leaves to said head, closure means removably carried by said head for encasing said filter leaves in liquid-tight manner, ported trunnion bearings for said head arranged to permit rotation thereof about an axis transverse to said passageway, liquid inlet and outlet passageways permanently connected to said ported trunnion bearings, said filter elements being exposed to the unfiltered liquid entering said closure through one of the trunnion ports, means connecting said outlet hubs to the other trunnion port for conducting the filtered liquid to the outlet of, the device, and means for tilting said filter head about said trunnion bearmgs.

3. A filter having a plurality of spaced separable filter leaves, each filter leaf having a filter screen, an imperforate plate in spaced relation with said screen, and a tubular member at the perimeter of said screen and plate for enclosing the edges thereof, said member being in open communication with the space between said screen and said plate, an outlet hub secured to each of said filter leaves and having an axial passageway normal to the plane of the filter leaf and opening into said tubular member, a filter head for supporting said filter leaves and formed with suitable fluid inlet and outlet passageways, means for detachably securing said leaves to said head, and closure means removably carried by said head for encasing said filter leaves in liquid-tight manner.

4. A filter leaf comprising a filter screen, an imperforate plate in spaced relation with said screen, a tubular member at the perimeter of said leaf for enclosing the edges of said screen and said plate, said member being in open communication with the space between said screen and said plate, an outlet hub secured to the periphery of said member and having an axial passageway normal to the plane of said member, and a spacer secured to said member at a point opposite said hub and having its axis normal to the plane of said member.

RAYMOND G. TESSMER.

REFERENCE-S CITED The following references are of record in the file of this patent:

UNiTED STATES PATENTS Number Number 8 Name Date Sweetland May 22, I928 Sweetland et a1. Feb. 11, 1930. Sweetland June 24, 1930 Brace et a1. July 12, 1932 Wood et al. Aug. 16, 1932 Norquist et a1 July 25, 1933 Wiesman 1 Sept. 10, 1935 Walker Mar. 31, 1936 Moran June 16, 1936 Soderquist Nov. 12, 1940 Marvel May 6, 1941 Kracklaue'r Apr. 7, 1942 Kelley Nov. 3, 1942 Kidd Aug. 24, 1943? Jacobo'witz Aug. 31, 1943 Hunziker Aug. 7, 1945' 'Na'izgle 1 1- Aug. 7, 1945 

